Sitting on a fat stack of cash is not all it’s made out to be. Sometimes it’s just a pain in the rear, or more precisely the hip (and spine and lower back). A traditional billfold full of currency, credit cards, receipts, and photographs can actually lead to back and hip problems, such as sciatica. Fortunately, there is a way to slim your look as well as straighten your posture. These low-profile wallet options will keep all of your essentials in a compact design that is small enough to carry up front in a pants or jacket pocket.